The effects of silicate nitrogen and potassium on the incidence of rice blast disease caused by pyricularia oryzae

Chung, B.K.; Heo, N.Y.; Cho, E.H.; Lee, J.Y.

Research Reports of the Office of Rural Development 22(SOIL, FERT , CROP PROT , MYCOL): 56-62


Accession: 006667574

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The ratios of absorption amounts of silicate and N in plant tissues were in proportion to the fertilizers applied. There was a highly negative correlation between percent of silicified cells and incidence of blast disease regardless of cultivars used. The percent of silicified cells was in proportion to the ratio of SiO2/N. K did not show a definite trend affecting blast incidence. The absorption amount of silicate in leaf tissue decreased with increase of amount of nitrogenous fertilizer, with additional silicate application. This was mainly due to antagonistic reaction between the 2 fertilizers.